What is monolithic isolation joints?
A monolithic isolation joint (MIJ) is designed to act as a single piece (monolithic) electrical isolation (blocks cathodic protection system voltages) component that is welded or joined (joint) to the pipeline.
What does an isolation joint do?
Isolation joints allow for anticipated differential horizontal and vertical movements between pavements and structures. Their purpose is to allow movement without damaging adjacent structures.
What is pipeline isolation joint?
Isolation joints provide an electrical break between pipeline sections of the same or different pipelines, or between pipeline sections and neighboring structures. The Purpose of the isolation joint is to prevent detrimental electro-chemical interaction and improve the effectiveness of the cathodic protection system.
What is insulating joint?
Insulating joints (or isolating joints or isolation joints) provide electrical isolation and cathodic protection in pipeline, tanks and pumping station where petroleum, gas and water are carrier fluid.
What is an isolation joint in concrete?
An isolation joint is a separation between adjacent sections of a concrete structure to allow relative movement in three directions and through which all of the bonded reinforcement is interrupted.
What is isolation flange?
Flange isolation kits are used to seal and electrically insulate flanges, thereby maintaining the integrity of piping systems. By preventing metal-to-metal contact, they mitigate corrosion caused by galvanic action or when used in conjunction with a cathodic protection system. Gasket for water project failed hydrotest.
Why are isolation joints used in concrete?
Also called concrete isolation joints Concrete isolation joints provide relief from the tensile stresses that cause uncontrolled cracking in concrete slabs by allowing the concrete to move freely as it shrinks or expands. Concrete expands and shrinks with changes in moisture, humidity, and temperature.
What is isolation joints in concrete?
What is insulating flange?
Insulating flanges are those flanges equipped with plastic pieces that insulate and prevent the flow of an electric current between two metal surfaces. Insulating flanges are used in cathodic protection systems to prevent electrolytic corrosion.
Where are isolation joints placed?
Isolation joint material should go all the way through the slab, starting at the subbase, but should not extend above the top. For a cleaner looking isolation joint, the top part of the preformed filler can be cut off and the space filled with elastomeric sealant.
What is the difference between expansion joint and isolation joint?
While isolation joints are recommended both inside and out, expansion joints are designed primarily for outdoor situations where weather extremes can add to slab movement.
What is a phenolic gasket?
A phenolic gasket is part of a flange isolation kit that is designed to operate in a pipeline by providing electrical isolation in cathodic protection (CP) systems with flange isolation. By resisting oil, water and salts, they are an essential tool to minimize future damage of the pipeline.
What is a LineBacker gasket?
LineBacker® sealing gaskets use a rectangular sealing element, referred to as a “quad” ring, in combination with a unique groove design to effectively seal and isolate flanges of all types. With the unique quad ring design, elastic memory is provided for elastomers not normally associated with this characteristic.
What is an isolation joint in slab?
Isolation joints are a gap between the slabs that is typically filled with preformed joint material for the full depth of the slab. This gap completely isolates one slab from another structural member, such as a column, wall or pipe. That way, when the slab moves, it can do so without affecting a nearby column or wall.
Why do we insulate a flange?
What is gasket and types of gasket?
Types of Gaskets
| Non-Metallic | Metallic – Ring Gasket | Composite |
|---|---|---|
| Compressed Non-Asbestos Fibre Gasket (CNAF) | Oval Ring Gasket | Spiral Wound Gaskets |
| PTFE Gasket | Octagonal Ring Gasket | Camprofile Gaskets |
| Rubber Gasket | Metal Jacketed Gasket |
How does a monolithic isolation joint work?
Monolithic isolation joints provide electrical isolation between segments of linepipe. As the name implies, a monolithic isolation joint appears as a solid block. It can seem a simple piece of equipment because it has no moving parts and is supplied fully assembled and ready to weld into the pipeline.